Brake or clutch band lining



mgm 2@ wm 3,49%28 G. K. GILLETTE BRAKE OR CLUTCH BAND LINING Filed ,V 5 1922 Patented pr. 29, i924.

entre GEORGE K. GILLETTE, 0F PWBROKE, MASSCHUSETTS.

BRAKE 0R CLUTCH BAND LINING.

Application filed July 5,

To all whom t lmay conce/imi- Be it known that l, Gnonon K. GILLE'rrE, a citizen of the United States', residing at len'ibroke, in the county of Plymouth and State of Massachusetts, have invented new and uset'ul Improvements in Brake or Clutch Band Linings, ot' which the following is a specification.

This invention relates particularly to a lining or inner facing of compressible material, adapted to be riveted to a resilient compressibleV metal band which is compressed or closed by means provided for that purpose on a rotating drinn, forming an element of a. gear transmission, such as is used on motor vehicles, ythe lining being pressed against the drum by the closing ol the band. The band and lining usually run in a casing containing oil.

The chief object of the invention is to provide a band lining or facing, adapted to absorb and accumulate a considerable quantity of oil when the band is loose, so that when the band is closed a sutiicient quantity of oil will be carried 4b the inner surface of the lining ,for proper lubrication.

Other objects will appear hereinafter.

The invention is embodied in the improvements hereinafter vdescribed and claimed.

Of the accompanying drawings forming a part of this specification;-

Figure 1 is an edge view of a band provided vvith a lining embodying the invention, parts. of the band and lining being shown in section.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is a section on line 3 3 of Figure 1,

Fiofure 4 is a fragmentary side, view, showing a portion of the lining.

Figure 5 is a section on line 5-5 of Figure 4.

Figure 6 is a section online 6-6 of Figure 4.

Figure 7 is a view similar to Figure 4 showing a modification. f

Figure 8 is a section on linel 8-8 of Figure 7 The same reference characters indicate the same arts in all of the figures. 4 7

In the rawings, 12 represents a resilient metal band, adapted to nearly surround a rotating drum 13, and to be closed thereon by well known means, not shown, the band being normally/fopen, so that the lining here- 1922. Serial No. 573,021.

inafter described is out of binding' contact with the drum.

My improved lining is a iiexible strip,

practically co-extensive in length and Width er is textile fabric, such as woven webbing having selvage edges, the width of the webhing being that desired for the lining.

Between the casing layers 15 is interposed a cushioninglayer, composed of sections 16 of any suitable compressible absorbent material, such as ground cork and a binder, formed into a sheet from which the sectionsA 16 may be cut. l have used with satisfactory results cushioning layers composed mainly of a mixture of ground cork and linseed oil, such as that used in the manufacture of linoleum.

The sections are arranged in tandem order. Their adjacent ends are spaced apart,

and the outer ends ot the terminal layers S5 are spaced from the ends of the casing layers 15, so that the casing layers meet between the sections and at the ends of the lining, and form relatively thin portions,

adapted to receive the rivets 14.' The heads 90 of the rivets are therefore offset from the face portions of the inner casing layer, which are backed by the cushioning layer sections, so that the rivets 'are prevented from contacting with and injuring the e5 drum 13.

The casing layers 15 are united to form a sheath, enclosing and coniining the sections 16, by suitable fastenings such as longitudinal rows of stitches 20, of strong thread. Three rows are preferably provided, as shown by Figures 2 vto 6. The stitches of the outer rows unite the casing layers 15, outside the sect-ions. The stitches i ofthe intermediate row pass through the cushioning sections, as shown byFigure 2. The thread is under such tension when the vstitchesV are formed, that the casing layers are caused to sink into the cushioning layer sections, the latter being compressed at 11o their longitudinal central portions. A longitudinal channel 21 is thus formed between essere' suitable non-metallic ma- 65 the outer edges and in the inner side of the lining, in which oil accumulates, when the band is separated from the drum, the accumulated oil being squeezed out and flowing toward the outer edges when the band is closed on the drum.

rlhe webbing of which the innerycasing layer 15 is made, is preferably herring bone woven, so that it presents angular surface ridges extending across the layer, and obliquely in opposite directions from the longitudinal center to the edges of the lining, as indicated by the oblique shade lines in Figure 4f. These ridges form 0blique lateral channels, communicating with the longitudinal channel 21, and adapted to conduct oil from the latter to the edges of the lining when the band is closed on the drum. The oblique arrangement of these lateral vchannels causes the rotation of the drum to draw oil through the channels, the rotation of the drum being in the direction indicated by the arrow in Figure 4.

lt will now be seen that the entire lining is of absorbent material, so that it absorbs oil when the band is not in use, and gives out the oil when the lining is pressed against the drum by the closing of the band. The channel 21 is adapted to contain a considerable quantity of oil and give the same out when the lining is closed on the drum. The cushioning sections entirely enclosed between the casingl layers are not exposed to contact with the drum, the inner surface lof the lining contacting with the drum being homogeneous, and formed entirely by the inner casing layer, which is interposed between the cushioning material and the drum. The lining is therefore more durable than would be the case if the cushioning material were composed ofV inserts, or sections forming portions of the inner surface ofthe lining, and contacting with the drum. Moreover, the entirely encased cushioning material, protected by the inner casing layer against frictional wear, neednot necessarily have the wear-resisting quality which would be necessary if it were exposed to `contact with the drum.

.The cushioning layer sections may be made of any material having suiiicient comypressibility and absorptiveness. For example, said sections may be strips of Brussels or other pile carpeting, arranged with the pile side 1n contact with the inner casing Leeaoae layer. Wool felt may be employed if desired.

rlhe modification shown by Figures 7 and 8 comprises a one piece cushion 1Ga which may extend nearly the entire length 'of the lining, and is provided with notches 1. A compressible lining for a brake or clutch drum band, said lining including outer and inner layers of textile fabric. and having a homogeneous inner surface, and a central longitudinal channel in said inner surface in which oil accumulates when the lining is separated from the drum, and from which the accumulated oil is pressed toward the edges of the lining when the latter is closed on the drum.

2. A compressible lining for a brake or clutch drum band, said lining including outer and inner layers of textile fabric, an in'- termediate cushioning layer of greater compressibility than the outer and inner layers and fastening means connecting said layers, the inner layer forming a homogeneous lining surface, and the said fastening means including a longitudinal row of stitches, lo-

cated midway between the longitudinal edges of the lining and pressing a portion of the inner layer into the cushioning layer to form a central longitudinal channel in said inner surface in which oil accumulates when the lining is separated from the drum, and from which the accumulated oil is pressed toward the edges of the lining when the latter is closed on the drum.

3. A brake or clutch band lining substantially as specified by claim 1, the said inner layer being composed of herring bone Woven textile fabric, presenting kangular surface ridges extending across said layer and" obliquely in opposite dir ections from the vlongitudinal center to the edges thereof, Said ricges forming oblique oil-conducting channe s.

In testimony whereof I have affixed my signature.

GEORGE K. GILLETTE. 

